Radeon HD 6850 and Radeon HD 7970 GHz Edition - video card comparison
Radeon HD 6850
Radeon HD 7970 GHz Edition
Architecture
TeraScale 2 (2009−2015)
GCN 1.0 (2012−2020)
GPU code name
Barts
Tahiti
Market segment
Desktop
Desktop
Release date
October 2010
June 2012
Bus support
AGP
PCIe 2.1 x16
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
1x 6-pin + 1x 8-pin
Boost clock speed
-
1050 MHz
Floating-point performance
1,488.0 gflops
4,301 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
4,313 million
Pipelines / CUDA cores
960
2048
Power consumption (TDP)
127 Watt
250 Watt
Texture fill rate
37.20
134.4
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
3 GB
Memory bus width
256 Bit
384 Bit
Memory clock speed
-
1500 MHz
Memory bandwidth
128.0 GB/s
288 GB/s
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
1
1
HDMI
+
+
DisplayPort support
-
-
DirectX
DirectX® 11
DirectX® 11
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
AppAcceleration
-
-
CrossFire
1
1
Enduro
-
-
FreeSync
-
1
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-